Porsche Cayenne vs Mercedes-Benz C63
What's the difference?

Porsche Cayenne

$144,900 - $376,200

2026 price

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Mercedes-Benz C63

$88,888 - $144,888

2021 price

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Land Rover Discovery Sport

Mercedes-Benz EQ-Class

Mercedes-Benz G-Class

Mercedes-Benz G580

Mercedes-Benz G63

Mercedes-Benz GLA-Class

Mercedes-Benz GLB-Class

Mercedes-Benz GLC-Class

Mercedes-Benz GLE-Class

Mercedes-Benz GLE400

Mercedes-Benz GLE450

Mercedes-Benz GLS

Mercedes-Benz GLS-Class

Mitsubishi Eclipse Cross

Mitsubishi Outlander

Mitsubishi Pajero

Mitsubishi Pajero Sport

Rolls-Royce Spectre (bev)

Summary

2026 Porsche Cayenne

2021 Mercedes-Benz C63

By Stephen Ottley

By Matt Campbell

Safety Rating

Electric motor type

—

Twin Turbo V8, 4.0L

Vehicle type

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Premium Unleaded Petrol

Electric range

—

10.3L/100km (combined)

Energy consumption

—

Battery capacity

—

Seating

Likes

Immense performance
Surprisingly capable off-road
Thoughtful cabin design

Amazing power
Addictive sound
Impressive to drive in most situations

Dislikes

No new petrol or hybrid variant (yet)
Coupe bodystyle loses practicality
Off-road bodykit looks awkward

Price is high
Still not 100 per cent on the Coupe’s looks
No applicable ANCAP score

2026 Porsche Cayenne Summary

No good deed goes unpunished.

Porsche, a brand synonymous with petrol-guzzling sports cars, tried to do the right thing and make a nearly wholesale switch to electric vehicles by the end of the decade. The problem was, while this made governments happy, it didn’t sit well with customers.

Porsche’s all-electric Macan is enduring a torrid 2026, with sales down over 75 per cent now that all the petrol-engined options are gone.

But that hasn’t stopped the German brand trying again with an all-electric Cayenne. However, there are some key differences that mean this latest electric Porsche won’t suffer the same fate.

Namely, the petrol-powered and hybrid versions aren’t going anywhere and new versions are rumoured to be coming in the not-too-distant future.

For now though, we have this all-new electric Cayenne - so how does it stack up to its predecessors as the sports car brand’s big SUV? And will it be second time lucky for Porsche’s electric transition? Based on two rather unorthodox days of test driving, the verdict might surprise you…

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2021 Mercedes-Benz C63 Summary

If you know the Mercedes-AMG C 63 S, you know it’s a hardcore V8 thumper with little in the way of bashfulness. It’s a brawler. A beast.

Now there’s an even more eye-catching AMG C 63 S Coupe, which we’re testing here. It’s the Aero Edition - a collector’s version of the current-generation C 63 S Coupe with a bit more visual bling that also helps it stick to the road better.

It is a local area special edition, with only 63 examples to be sold across Australia and New Zealand. And if the rumours are true, the next-generation will see the V8 engine in danger of being axed in favour of a hybrid, high-performance four-cylinder version. Say it ain’t so!

Well, if the CarsGuide crystal ball turns out to be right, maybe one of these C 63 S Aero Editions is worth getting in your garage quick-smart. Or is it? Let’s go through the criteria and see how it stacks up.

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Deep dive comparison

2026 Porsche Cayenne 2021 Mercedes-Benz C63

Verdict

There is a lot riding on this new Cayenne Electric, it is the sales leader for the German brand and if it suffers the same sales decline as the Macan, that will be a big concern for Porsche.

The good news is it’s an impressive all-rounder, with an incredible breadth of capability. But so is the electric Macan.

Going electric hasn’t diminished its trademark Porsche elements, and instead has amplified them in many respects. The speed is nothing short of staggering in the Turbo, but across the range the on and off-road driving ability is impressive.

Plus it has the kind of spacious, well-considered and premium appointed cabin you should expect for a luxury SUV.

There are two key differences that could see it succeed where the Macan has faltered. Unlike the Macan, Porsche’s decision to give Cayenne buyers the option to stick with internal combustion if they prefer, is likely to ensure it remains a popular member of its line-up for years to come.

And while the Macan was perhaps too much, too soon, the Cayenne arrives at a time when Australians are embracing electric cars more than ever before. Although the luxury and performance end of the EV market is growing more slowly than the mainstream.

As for the pick of the range, as mind-blowing as the Turbo is, the truth is (like pretty much every Porsche model) the entry-level Cayenne is arguably the pick of the bunch. It has all the performance you’ll reasonably need and offers a good blend of capability and luxury for the lowest price.

Note: CarsGuide attended this event as a guest of the manufacturer with travel, accommodation and meals provided.

Verdict

The Mercedes-AMG C 63 S Aero Edition is an absolute beast of a car, but it comes at a pretty hefty price. Yes you get a lot of performance, and the fact there are only 63 examples being made for Australia and New Zealand could be enough to get you to sign on the line. For me, though, if I was after a C 63, it’d have to be a wagon. It doesn’t need an Aero pack to look better.

Porsche Cayenne vs Mercedes-Benz C63 What's the difference?

Summary

Deep dive comparison

Verdict

Verdict

Porsche Cayenne vs Mercedes-Benz C63
What's the difference?